<!DOCTYPE html>
<html lang="en">
<head>
    <meta charset="UTF-8">
    <meta name="viewport" content="width=device-width, initial-scale=1.0">
    <title>Document</title>
    <style>
        ol>li{
            color:red;
            font-size:30px;
        }
    </style>
</head>
<body>
    <ol>
        <li>列表1</li>
        <li>列表2</li>
        <ul>
            <li>列表3</li>
        </ul>
    </ol>
</body>
</html>